Sun Microsystems SPARC Series, Service Manual

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4-2 SPARC Enterprise M3000 Server Service Manual • January 2009
4.2 FRU Replacement and Installation
Methods
This section explains how to replace and install FRUs.
4.2.1 FRU Replacement
There are three methods of replacing FRUs, as follows:
■
Active replacement
A target FRU is operated while the Solaris OS of the domain to which the FRU
belongs is operating.
The target FRU is operated by using Solaris OS commands or XSCF commands.
Because the power supply unit (PSU) and fan unit (FAN) do not belong to any
domain, they are operated by using XSCF commands regardless of the operating
state of the Solaris OS.
■
Hot replacement
A target FRU is operated while the domain to which the FRU belongs is stopped.
Depending on the target FRU, there are two cases as follows:
■
Power supply unit/Fan unit: operated with XSCF commands.
■
Hard disk drive: operated directly, not by using XSCF commands.
■
Cold replacement
After all the domains are stopped and then the server is powered off, a FRU is
operated.
Note –
Do not operate a target FRU while the OpenBoot PROM is running (the ok
prompt is displayed). After stopping the relevant domain (power-off) or starting the
Solaris OS, operate the target FRU.
4.2.2 FRU Installation
For empty slots without hard disk drives or PCIe cards, the number of mounted
FRUs can be changed from 1 to the maximum number as required. There are some
components that are tentatively mounted physically in the server. If such a